INCOME TAXES - Provision for taxes (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Current:
Federal						$ 0	$ 0		$ 0
State						265	306		128
Current Income Tax Expense (Benefit), Total						265	306		128
Deferred:
Federal						0	0		0
State						0	0		0
Deferred Income Tax Expense Total						0	0		0
Tax expense	$ (47)	$ 99	$ 35	$ 134	$ 87	$ 265	$ 306	[1]	$ 128	[1]

[1] Amounts are revised. See Note 3 for more information.